Linear ion trap, mass spectrometer and method based on asymmetric triangular electrodes

Abstract

The invention discloses a linear ion trap mass analyzer based on asymmetric triangular electrodes, a mass spectrometer and a working method. The ion trap mass analyzer comprises a pair of asymmetric triangular columnar X electrodes, a pair of symmetrical Y electrodes and a pair of end cover Z electrodes. Each X electrode and each Y electrode are mutually parallel. The distance from the center axis of the ion trap mass analyzer to each X electrode and each Y is equal. The electrode angle of each Y electrode is alpha. The electrode angle of one X electrode is alpha+delta alpha, the electrode angle of the other X electrode is alpha-delta alpha, and the delta alpha is greater than or equal to 10 degrees and is smaller than or equal to 22.5 degrees. An ion lead-out slot is arranged at the center of each X electrode.

Description

technical field [0001] The invention belongs to the technical field of mass spectrometers, and in particular relates to a linear ion trap mass analyzer based on an asymmetrical triangular electrode, a mass spectrometer and a mass spectrometry analysis method. Background technique [0002] Mass spectrometry plays a pivotal role in the field of modern analysis, and has been widely extended to many fields such as environmental protection, food safety, life science and space exploration. As a modern analytical instrument, mass spectrometer has high detection sensitivity and can effectively detect trace substances. It is a good qualitative and quantitative analysis tool. [0003] The mass analyzer is the core component of the mass spectrometer. According to the different mass analyzers, the mass spectrometer can be divided into magnetic mass spectrometer, Fourier transform-ion cyclotron resonance mass spectrometer, ion trap mass spectrometer, quadrupole mass spectrometer and time...

AI Technical Summary

Problems solved by technology

However, this structure will greatly increase the volume, power consumption, detection circuit and manufacturing cost of the mass spectrometer and is not conducive to the miniaturization of the mass spectrometer.

Therefore, in the existing linear ion trap mass spectrometer, usually only one ion detector is used for ion detection, the theoretical maximum ion detection efficiency of this detection method is only 50%, and the actual ion detection efficiency is lower than this value

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